sealed-beam
adjective
ˈsēl(d)-ˈbēm 
: being an electric lamp with a prefocused reflector and lens sealed in the lamp vacuum
Word History
First Known Use
1939, in the meaning defined above
- show-runners
- show-through
- show/see (someone) to the door
- show/teach (someone) a trick or two
- showable
- showbiz
- showbizzes
- showbizzy
- showboard
- showboat
- showboated
- showboater
- showboaters
- showboating
- showboats
- showbread
- showbreads
- showcase
- showcased
- showcases
- showcasing
- showdown
- showdown inspection
- showdowns
- showed